Research on edge isolation technology for multi cut TOPCon batteries: providing new ideas for efficient collaboration between photovoltaics and packaging materials

Research focuses on edge isolation of multi cut TOPCon solar cells. According to the information published in Volume 310 of Solar Energy Materials and Solar Cells, authors Wenli Yan, Zunke Liu, Xukai Zhao, and others have conducted prospect and theoretical research on edge isolation technology of multi cut TOPCon solar cells. This article is expected to be published on January 15, 2027. The research topic points to the edge processing problem of TOPCon cells in the slicing process, which belongs to the research direction of the intersection of photovoltaic cell manufacturing technology and material properties. Multi cutting technology is one of the processing methods to improve the efficiency of battery cell production, but cutting edges often brings composite losses and insulation risks, making edge isolation a key process that affects battery performance and reliability. This study analyzes the application prospects of edge isolation technology in multi cut TOPCon batteries from a theoretical perspective, providing a basis for the selection and optimization of process routes.

The significance of photovoltaic materials and packaging process

The cutting and edge treatment of the battery end should ultimately match the packaging material and photovoltaic backplate at the module end.

. The quality of edge isolation directly affects the weather resistance and long-term stability of battery cells, and components also rely on materials such as encapsulation film and backplate to provide insulation and barrier protection during long-term outdoor operation. The edge processing approach involved in the research can provide reference for component companies when selecting packaging material systems. For example, when evaluating weather stability performance, the insulation state of battery cutting edges and the water and gas resistance of packaging adhesive films should be considered together. From the perspective of material formulation, photovoltaic backsheet and packaging materials are exposed to UV, humid, and temperature cycling environments for a long time, and usually require the use of antioxidant and other auxiliary systems to suppress the aging and degradation of polymer materials. If edge isolation technology can reduce the defect density and leakage risk at the edge of the battery, it will help alleviate the additional pressure of electrochemical and thermal effects on the packaging materials inside the components, thereby forming synergy with weather resistant and stable design. For polymer materials related to energy storage and hydrogen energy, although the application scenarios are different, the attention to aging mechanism and interface stability in long-term reliability assessment is common.

Industry observations and areas to be clarified

This study focuses on theoretical exploration, and the abstract information does not disclose specific isolation methods, experimental data, and efficiency improvement rates. Relevant process parameters and industrialization feasibility still need to be further confirmed in conjunction with the complete paper.

. For the polymer additive industry, this research direction suggests that changes in photovoltaic cell processing technology may pose new matching requirements for the weather resistance system of packaging materials and backplates, which deserves continuous attention in material formulation design and testing evaluation.

Information source:Prospects and theoretical investigation of edge isolation technology in multi-cut TOPCon solar cells， Organized by Herun Chemical.